Fix info header stats to iterator over layer instead of scene

Although this is working fine, there are two changes expected in the new
future once depsgraph copy on write is implemented:

1) To call ED_info_stats_clear a callback from depsgraph, instead of the
notifier system. (that would also allow us to clear only one
SceneLayer).

2) To store/get stats from the evaluated SceneLayer, as well as iterate
over the evaluated objects as well.

2 files changed, 4 insertions, 3 deletions

diff --git a/source/blender/blenkernel/intern/layer.c b/source/blender/blenkernel/intern/layer.c
index 5942e575fd2..fddffa63a59 100644
--- a/source/blender/blenkernel/intern/layer.c
+++ b/source/blender/blenkernel/intern/layer.c
@@ -175,6 +175,8 @@ void BKE_scene_layer_free(SceneLayer *sl)
 		IDP_FreeProperty(sl->properties_evaluated);
 		MEM_freeN(sl->properties_evaluated);
 	}
+
+	MEM_SAFE_FREE(sl->stats);
 }
 
 /**
diff --git a/source/blender/blenkernel/intern/scene.c b/source/blender/blenkernel/intern/scene.c
index b8d69c6077b..ff29affd6d9 100644
--- a/source/blender/blenkernel/intern/scene.c
+++ b/source/blender/blenkernel/intern/scene.c
@@ -254,7 +254,6 @@ Scene *BKE_scene_copy(Main *bmain, Scene *sce, int type)
 		scen->theDag = NULL;
 		scen->depsgraph = NULL;
 		scen->obedit = NULL;
-		scen->stats = NULL;
 		scen->fps_info = NULL;
 
 		if (sce->rigidbody_world)
@@ -317,6 +316,7 @@ Scene *BKE_scene_copy(Main *bmain, Scene *sce, int type)
 		BLI_duplicatelist(&scen->render_layers, &sce->render_layers);
 		SceneLayer *new_sl = scen->render_layers.first;
 		for (SceneLayer *sl = sce->render_layers.first; sl; sl = sl->next) {
+			new_sl->stats = NULL;
 			new_sl->properties = IDP_New(IDP_GROUP, (const IDPropertyTemplate *){0}, ROOT_PROP);
 			new_sl->properties_evaluated = NULL;
 
@@ -571,8 +571,7 @@ void BKE_scene_free(Scene *sce)
 	DEG_scene_graph_free(sce);
 	if (sce->depsgraph)
 		DEG_graph_free(sce->depsgraph);
-	
-	MEM_SAFE_FREE(sce->stats);
+
 	MEM_SAFE_FREE(sce->fps_info);
 
 	BKE_sound_destroy_scene(sce);